Why is the change of state for moth balls useful?

The change of state for mothballs, which typically involves sublimation (transitioning from solid to gas without becoming liquid), is useful because it allows for the gradual release of pesticide vapors that effectively repel moths and other insects. This slow evaporation ensures a longer-lasting effect compared to other forms of pest control. Additionally, it minimizes the need for frequent replacements, making it a convenient solution for protecting clothing and stored items from damage.